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The simplex lattice design is a space filling design that creates a triangular grid of runs. The design is the set of blends where the factors’ values are i / m, where i varies from 0 to m and the sum of the factors is 1. For a three-level design, a factor can be set at 0, 0.33, 0.66, or 1.
1.
Select DOE > Classical > Mixture Design.
3.
Click Continue.
4.
Click Simplex Lattice to generate the design.
Figure 13.10 Three Factor Five-Level Simplex Lattice Design
5.
Click Make Table.
6.
From the design table, select Graph >Ternary Plot.
7.
Select X1, X2, and X3 and click X, Plotting, and then click OK.
Figure 13.11 Ternary Plot for Simplex Lattice Design

Help created on 3/19/2020